On Sun, Mar 14, 2010 at 06:35:02PM -0600, compdoc wrote: > >64bit multi-vcpu. The guest is quite heavyweight, 30GB of memory and > >12vcpu. It's a LTSP server designed to handle lots of graphical logins > >for computer science students. This, I guess is not a common workload. > I was wondering if you wouldn't mind describing the hardware > this runs on? Sure, more detail at: https://bugzilla.redhat.com/show_bug.cgi?id=550724 this cut'n'pasted from there (comment #13): This hardware is relatively new, just over 6 months old. The main idea of the system is to be a development environment for math/comp sci students. It's setup to deal with up to 60 LTSP (Linux Terminal Server Project) terminals and nxclient/ssh connections. It replaces a 4 year old HP server with Fedora 10 that did the same thing. The old HP setup ran fedora 10, at its end of life, on the bare metal. The new server was supposed to make use of virtualization. The hardware of the new dom0 server is an IBM x3850 M2 with 4 Xeon Quad Core E7330 80W processors, 64GB of memory. Two IBM 73.4GB 2.5in 10K HS SAS HDD makeup the system storage for dom0. At the moment we are running Centos 5.4 with the latest kernel I could find: kernel-xen-2.6.18-186.el5 SAS attached for main storage is an IBM DS3200 with 12 750GB SATA HDD configured as one large raid 6 drive. We break up the large drive using LV. Various attachments of config and dmesg of dom0 to follow. I see no strange error messages in the dom0 (including /var/log/messages) except for the: (XEN) traps.c:1878:d5 Domain attempted WRMSR 000000000000008b from 00000021:00000000 to 00000000:00000000. reported by "xm dmesg" We don't use NFS in dom0 and the network around here is pretty much stable now. One thing to note. Originally we had hoped to run a fedora kernel as a dom0. However we struck bug #541615 (Calgary: DMA error on CalIOC2 PHB 0x3) and so were unable to get the attached storage to pass disk tests. RH enterprise/Centos is rock solid as a dom0 and passes any disk tests we can throw at it. -- Norman Gaywood, Computer Systems Officer University of New England, Armidale, NSW 2351, Australia ngaywood at une.edu.au Phone: +61 (0)2 6773 3337 http://mcs.une.edu.au/~norm Fax: +61 (0)2 6773 3312 Please avoid sending me Word or PowerPoint attachments. See http://www.gnu.org/philosophy/no-word-attachments.html